<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="shortcut" href="#"/>
</head>
<body>
<h1>index</h1>
<div th:if="${session.account !=null}">
    <span th:text="${session.account.username}+'欢迎回来'"></span>
    <a href="/logout">退出</a>
</div>
<a href="/main">main</a>
<a href="/manage">manage</a>
<a href="/administrator">administrator</a>
</body>
</html>